Blowpipe for welding-machines.



J. HARRIS.

BLOWPIPE FOR WELDING MACHINES.

APPLICATION FILED SEPT-1.1917.

Patented Dec. 24, 1918.

' v essence.

JOHN HARRIS, 01F LAKE-W001 OHIO, ASSIGNOR 0F ONE-HALF TO JAIi'IES@TFFKQE.

R. ROSE, 0F

EDGEWGRTH, PENNSYLVANIA.

BLOWPIPE EOE WELDIN C -MACHINES.

To (ZZZ whom it may concern Be it known that 1, JOHN Hernia, a citizenof the United States, residing at Lakewood, in the county of Cuyahogaand State 'of Ohio have invented a certain new and useful Improvement inBlowpipes for Welding-Machines, of which the following is a ment of thetip the object being to improve upon the constructions now in use andproduce a more effective and complete weld.

in the blow pipes for welding machines 1 now in use a tip is employedhaving a pluralit of 'et openin s throu h'which the l l I: g

, combustible preheating gas emerges producthe preheating 1s quickly andeconomically as it should be,

ing a plurality ofspaced independent jets,

and adjacent to this series of preheating ets is the welding jet.

This form of tip while being efiicient to a certain extent isobjectionable inasmuch as the series of independent spaced preheatingjets permits air, which contains nitrogen, to

circulate or be drawn between these separated preheating jets with theresult that not accomplished as and my improvement is d vised with theidea of overcoming or eliminating just these defects. v V This Iaccomplish by constructing the tip essentially funnel shaped, the bottomthereof being elongated and provided with a long narrow slot throughwhich the preheating gas emerges producing a long thin flame whichimpinges against the line of proposed weld and prevents the entrance oregress of air and consequently eliminates the deleterious effect ofnitrogen contained in the air.

Adjacent to the slot for the preheating gas is a small opening for thewelding flame and this opening is made at such an angle that the weldingjet will be directed obliquely toward the line of weld and convergingtoward the preheating flame.

The invention embraces other features of construction and arrangementaereinaitter more fully described and pointed'out in the claims.

In the drawings forming a art of this specification 1 have shown one ormof can Specification of. Letters Patent.

Application filed Septemberl, ierr. Serial no. 189,241.

'rying out my invention but it will be understood that other forms maybe employed within the scope of the appended .claims withoutdeparting'from the broad principles of the invention.

in these drawings Figure 1 is a' vertical sectional view of a blow pipeconstructed in accordance with my invention; Fig. 2 is a horizontalsection on the line 22 of Fig. l;

" Fig. 3 is a detail section on the line 33 of Fig. 2; Fig. i is ahorizontal section' on the line 4.& of Fig. 1; Fig. 5 is a verticalsectional view of a slightly modified form of tip; Fig. 6 is a detailperspective view of the same; and Fig. 7 is a detail perspective view ofthe tip illustrated in section in Figs. 1 and a.

In constructing a blow pipe in accordance with my invention I employ avalve casting 10 having passages 11 and 12 bored therein.

and with which communicate the acetylene and oxygen supply pipes and thepassage of these gases through the casting is controlled by the valves13 and 14 respectively.

15 indicates the acetylene pipe and 16 the oxygen pipe leading from thevalve casting the lower endsm these pipes being rigidly secured to acircular block 17 spaced any suitable distance from the valve castingand secured by means of a surrounding sleeve'18 having Water inlet andoutlet connections 20 so that water can be introduced for the purpose ofcooling the pipe when desired.

The lower end of the pipe 15 communicates with an inclined passage 21While the lower end of the pipe 16 communicates with a central verticalpassage 22 produced in the block 17, both of these passages 21 and 22 inturn communicating with a chamber 23 formed centrally in the-bottom ofthe block 17 and connected to this block 17 at the bottom of the recess23 is a nozzle 24, the upper end thereof being enlarged and tapered asshown at 25, said enlarged and tapered end seating in a gasket 26 whichis secured to the end or the block 17 for the purpose of uniting thenozzle to the block. lhis nozzle has a central bore 27 which isenlarged. at its upper end as indicated at 28 and projecting into theupper end of this enlargement of the bore is a small injector nozzle 29secured into the lower end of bore 22.

The bore 27 extends entirely through the nozzle and secured upon the endof said nozzle is a tip 30, said tip being spread laterally in twodirections andcontracted in op-- posed directions so as to'provide a tipwhich is very narrow in line with the proposed line of weld but ofconsiderable length in order to provide a maximum amount of preheatingproduce a long narrow slot 31 in the bottom of the tip and adjacentthereto a single opening 32 and itv will be noted by reference to Fig. 1that this opening 32 is inclined so as to direct the flame toward theflame produced by the combustion of the gas issuing through theelongated slot 31.

In. Figs. 1, 4 and 7 I have shown a circular opening 32 employed incombination with the elongated slot 31, but if desired a similarelongated opening such as shown at 83 in Figs. 5 and 6 may be employedwith equally good results.

By means of the nozzle connection effected in the manner shown its tipcan be quickly and easily turned to any desired angle.

In operation, the acetylene and oxygen are commingled as they enter andpass through the nozzle 24 and the gases thus coni'mingled and mixed areprojected through the elongated slot 31 and the adjacent opening 32 andare ignited at these points with the re sult that there is reduced asingle long narrow preheating fi ame and a single welding flame adjacentthereto.

A tip constructed as herein shown and described completely eliminatesthe defects of the tip having a series of independent jets.

Having thus described my invention, what I claim is 1. In a blow pipefor welding machines, a tip having an elongated slot for the preheatingflame and a single discharge opening for the welding flame.

2. In a blow pipe for welding machines, a tip having an elongated slotfor the'preheating flame and a single discharge opening for the weldingflame, said single discharge openin being arranged adjacent to the endof said slot and shaped to direct the welding 5. In a blow pipe forwelding machines, a

tip contracted in one direction thereby pro-' viding an elongated tip,an elongated slot in the bottom thereof and a single opening adj acentto the end of said slot, a nozzle connected to said tip and dischargingthereinto, a block to which said nozzle is connected and gas tubescommunicating with said block and supplying commingled gases to the nozze.

6. In a blow pipe for Welding machines, the combination with a tiphaving an elongated. slot and a single discharge opening, a nozzle towhich said tip is connected, said nozzle having a central bore,.theupper end of said bore being enlarged and roviding a mixing chamber, ablock to whic said nozzle is connected, said block having gas pas sagesproduced therein which passages are adapted to communicate with theenlarged bore of the nozzle and gas supply. pipes communicating withsaid gas passages.

In testimony whereof, I hereunto aflix my signature.

JOHN HARRIS.

